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Threshold-based Naïve Bayes classifier

Author

Listed:
  • Maurizio Romano

    (University of Cagliari)

  • Giulia Contu

    (University of Cagliari)

  • Francesco Mola

    (University of Cagliari)

  • Claudio Conversano

    (University of Cagliari)

Abstract

The Threshold-based Naïve Bayes (Tb-NB) classifier is introduced as a (simple) improved version of the original Naïve Bayes classifier. Tb-NB extracts the sentiment from a Natural Language text corpus and allows the user not only to predict how much a sentence is positive (negative) but also to quantify a sentiment with a numeric value. It is based on the estimation of a single threshold value that concurs to define a decision rule that classifies a text into a positive (negative) opinion based on its content. One of the main advantage deriving from Tb-NB is the possibility to utilize its results as the input of post-hoc analysis aimed at observing how the quality associated to the different dimensions of a product or a service or, in a mirrored fashion, the different dimensions of customer satisfaction evolve in time or change with respect to different locations. The effectiveness of Tb-NB is evaluated analyzing data concerning the tourism industry and, specifically, hotel guests’ reviews from all hotels located in the Sardinian region and available on Booking.com. Moreover, Tb-NB is compared with other popular classifiers used in sentiment analysis in terms of model accuracy, resistance to noise and computational efficiency.

Suggested Citation

  • Maurizio Romano & Giulia Contu & Francesco Mola & Claudio Conversano, 2024. "Threshold-based Naïve Bayes classifier," Advances in Data Analysis and Classification, Springer;German Classification Society - Gesellschaft für Klassifikation (GfKl);Japanese Classification Society (JCS);Classification and Data Analysis Group of the Italian Statistical Society (CLADAG);International Federation of Classification Societies (IFCS), vol. 18(2), pages 325-361, June.
    • Handle: RePEc:spr:advdac:v:18:y:2024:i:2:d:10.1007_s11634-023-00536-8
    DOI: 10.1007/s11634-023-00536-8
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    References listed on IDEAS

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